Half of Americans don't know Planned Parenthood does abortions -- let alone that it is the biggest abortion business in the United States, according to a new Polling Company survey conducted for the National Right to Life Committee, LifeNews.com reports. The poll found that 88 percent of registered voters are familiar with Planned Parenthood, 40 percent know someone who has received services at Planned Parenthood, and 63 percent have a favorable impression of the organization. However, the same poll found that 55 percent did not know Planned Parenthood performs abortions. Fifty percent of pro-life respondents did not know Planned Parenthood performs abortions, and of the 45 percent who knew, the majority greatly underestimated the number of abortions Planned Parenthood performs annually. In 2011, the last year for which data is available, Planned Parenthood performed 333,964 abortions, or just over 27 percent of all abortions in the United States. "The polling reflects the results of Planned Parenthood's campaign to publicly minimize and obfuscate is involvement with abortion," said David N. O'Steen, National Right to Life executive director.